In which of the following electric circuits will the bulb glow?
A
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B
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C
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D
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Solution
The correct option is A Electric current in a circuit flows only when the circuit is closed and then only the bulb in the circuit will glow.
For glowing the bulb in a circuit, both terminals of the bulb should be connected to the two different terminals of the electric cell as shown in the option (d) in the given image.